Reamer



June 111930. F, P, MILLER 1,765,171

REAMER Filed May 16, 1925 'A ORNEYS Patented June 17, 1930 {FRANK P. MILLER, 01E MEADVILLE, PENNSYLVANIA REAMEB- Application filed May 16, 1925. Serial No. 30,787.

This invention relates to 'reamers. of the inserted blade type.

An important object is to provide simple means whereby the adjusting thrust collar 5 or collars of an inserted blade reamer may be applied to the body of the reamer without reducing the diameter of the bar elsewhere 'to get the collar on whereby to pro vide a reamer of the maximum diameter and strength.

A further feature of the invention resides in the means for connecting the sections of the adjusting thrust collar or collars subsequent to their application to the reamer.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this application and in which like numerals are employed to designate like parts throughout the same.

Figure 1 is a side elevation of an inserted blade reamer constructed in accordance withthis invention;

" Figure 2 is a perspective of an adjusting and thrust collar before being divided into sections for application to a reamer;

Figure 3 is a group perspective illustrating the sections produced as the result of dividing the adjusting and thrust collar;

Figure 4 is a side elevation illustrating the manner of connecting the sections of the adjusting and thrust collar subsequent to their application to the reamer, parts being shown in section;

Figure 5 is an enlarged detail sectional view illustrating the means for connecting the sections of the collar;

Figure 6 is a side elevation of a slightly modified form of collar;

Figure 7 is an edge elevation. of the collar illustrated in Fig. 6;

Figure 8 is a side elevation of a further modification of the invention;

Figure 9 is an edge elevation of the collar illustrated in Fig. 8.

In the drawing the numeral 5 designates a reamer bar consisting of a pilot 6, a threaded body 7 and a shank 8, the shank v being provided with a tool engaging end 9.

It is, of course, old to provide the body 7 I with gradually deepening grooves 10 in which blades 11 are held by means of adjusting thrust collars and to provide for the application of the thrust collars it has been necessary to make the diameter of thef shank 8 at least as small as the diameter of the body? with the result that the shank is not as strong as it otherwise would be. v

To overcome this difiiculty I provide the collar or collars 1-2, as the case may be, and

.apply the same to the body 7 in sections and subsequently connect the sections as will be explained. Figure 2 illustrates that the collar 12 is provided with oppositely located grooves 14 which weaken the collar and therefore permit the same to be easily cracked at predetermined points into two semi-circular sections. The grooves 14- are form-edin the collar by sawing or otherwise .9 prior to hardening the collar. It will be seen that the grooves let extend for the full length of the collar and leave only the end flanges 16 and the annular shoulder 18 uncut for holding the collar in one piece until it desired to divide the same.-

Figures 1 and 3 illustrate that the ragged ends resulting from cracking the collar are allowed to remain as they form a valuable aid in properly rejoining the sections when applied to thereamer body. In other words the slightly protruding meeting ragged ends of the parts 16 and 18 are mated to assure the proper alignment of the grooves 22 and. the internal threads of the collar. I

When the collar has been divided into two semicircular sections as shown in Figure 3 it may be easily applied to the body of the reamer and the sections wrapped with wire 20. The wire is, of course, tightly wrapped about the sections to give the collar its original form, and by reference to Figures 4-. and 5 it willbe observed that the various turns of the wire are received in annular grooves 22 defined by the shoulder 18 and the end ribs 16. p v V After the lengths of wire have been securely wrapped about the split collar at spaced points the annular grooves 22 may be filled with solder or the like to hold the wire blades.

In the form of invention illustrated in Figures 6 and 7 the ends of the sections 30 flatly abut each other and are provided With interlitting tongue and g 32. ders 84 may be provided with radial sockets or recesses for the reception of tongues carried by the shoulder or shoulders- This interfitting connection between the sections holds the sections against lateral movement with respect to each other and provides for the expeditious and accurate application of the sections to the reamer body. Of course, in this case, also, wire is tightly wrapped in the grooves 36 and may he subsequently covered by solder or other binding agent.

In the form of the invention illustrated in Figures 8 and 9, one of the sections 40 is provided with transverse or axially extending tonguestl which are received in trans verse recesses 42 in the other section desig nated by the numeral 44. y

In the forms of the invention illustrated in Figures 1 to Sinclusive, the sections of the collar, when joined about the body by means of the wire and the solder, will have a good working lit with the threads on the body. Thus each collar when applied to the body in the manner illustrated and described will possess the necessary strength and may be adjusted quite as easily as a one piece collar.

With reference to the foregoing description taken. in connection with the'accompanying drawing, it will be apparent that the collar or collars may be applied to the reamer body without reducing the diameter of the shank 8 with a resulting decrease in the strength of the reamer. 7

Having thus described the invention, what is claimed is 1. An adjusting'means for reamers'comprising a collar having a pair of complemental sections provided with grooves, a wrapping of non-elastic wire in said grooves, and a binding and covering member for said wire and substantially filling said grooves.

2. An adjusting means for reamers comprising a plurality of sections having spaced grooves defining shoulders, separate nonelastic holding members wrapped tightly about said sections and positioned in said grooves, said shoulders beingprovided at oove connect-ions More specifically, certain of the shoulthe ends thereof with interfitting holding means, and a filling and binding agent in said grooves. I

3. In a reamer, a bar having a reduced intermediate portion, a collar on said intermediate portion and consisting of a pair of sections having communicating grooves, a wrapping of wire in said grooves to rigidly hold the sections together, the meeting portions of said sections being provided with interfitting means cooperating with said wire to hold the sections against-movement with respect to each other.

4. In a reamer, a bar having a reduced portion, a collar on said reduced portion and 

